1538525052289 has 4 divisors (see below), whose sum is σ = 1539776904660. Its totient is φ = 1537273199920.

The previous prime is 1538525052257. The next prime is 1538525052299. The reversal of 1538525052289 is 9822505258351.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1108844802289 + 429680250000 = 1053017^2 + 655500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538525052289 - 2⁵ = 1538525052257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1538525052299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625924342 + ... + 625926799.

It is an arithmetic number, because the mean of its divisors is an integer number (384944226165).

Almost surely, 2^{1538525052289} is an apocalyptic number.

It is an amenable number.

1538525052289 is a deficient number, since it is larger than the sum of its proper divisors (1251852371).

1538525052289 is a wasteful number, since it uses less digits than its factorization.

1538525052289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251852370.

The product of its (nonzero) digits is 8640000, while the sum is 55.

The spelling of 1538525052289 in words is "one trillion, five hundred thirty-eight billion, five hundred twenty-five million, fifty-two thousand, two hundred eighty-nine".